10 Best Plagiarism Checker Tools To Check Content Uniqueness

Are you looking for some of the best plagiarism checker tools to check the authenticity of content? You have arrived at the right blog post.

Plagiarism can cause serious problems for individuals and organizations. Students may plagiarize someone else’s writing to earn qualifications dishonestly. Writers and bloggers may cut corners by “borrowing” part of existing material without giving proper credit.

Copying someone else’s work may seem harmless and unlikely to be discovered, but the consequences of plagiarism — even if unintentional — can be steep. And with modern plagiarism detection, it’s easier than ever to get caught.

Sophisticated software can scan the internet and other sources for a similar text that exists elsewhere. These modern tools will flag suspiciously similar and even partial sentences. And they can detect content that has been reworded or “spun” in an attempt to overcome plagiarism matches.

Plagiarism can lead to disciplinary action in academic and business settings, and copyright infringement can be costly to a person’s finances if sued as well as to their reputation.

For online publications like blog posts and articles, Google’s algorithm will penalize duplicate content in the search engine results pages (SERPs). This can sabotage even the best search engine optimization (SEO) strategy, as flagged content will plummet in the rankings.

The good news is that plagiarism checker software are widely available, and you can scan your content before submitting it or clicking “publish.” You can also use this software to check for others plagiarizing your published work. And some plagiarism software comes with additional tools that can help you create quality content.

The best plagiarism checker for your needs depends on a variety of factors. Let’s take a look at the 10 best plagiarism checkers so you can choose the right one for you.

1. Copyscape

Copyscape is perhaps the best known of all plagiarism checker tools. It is widely considered a staple among online content writers as well as people in other industries.

Copyscape offers a free plagiarism checker that’s easy to use. With no log in required, all you need to do is enter the URL of your page and click “Go.” It couldn’t be much easier.

If a match is found, the plagiarism report will show you which parts of the copy were flagged and the website where the matching copy is found. There is also a free tool that compares different articles directly against each other.

Copyscape also offers Copyscape Premium, a paid service that costs only $.03 for the first 200 words and $.01 for every additional 100 words you submit.

Copyscape - Best Plagiarism Checker Tools

You will need a pre-paid account to use Copyscape Premium. Once you have that, simply copy and paste the text in the box provided or upload the file you want to check. Then click “Premium Search” and the results will appear almost instantly.

Copyscape doesn’t offer any grammar check tools like some other plagiarism checkers, but the platform does offer the Copysentry service. It monitors the internet and alerts you if your content is being plagiarized.

Plans for Copysentry range from $4.95/month to $19.95/month with fees for additional pages.

2. Writer

Writer is an all-in-one writing assistant and helpful blogging tool trusted by some of the world’s leading brands. The platform’s plagiarism checker tool is easy to use. Just copy and paste your text and let the software do the rest.

Writer checks your copy against billions of other texts including academic papers, books, new sources, research papers, and web pages.

Writer - Plagiarism Checker Tools

Writer offers advanced features such as a free grammar check and punctuation check. You can also use the platform to help with content strategy and on-brand marketing, and the software is compatible with a range of apps including Chrome, Google Docs, Word, Outlook, and Vista.

You can use Writer’s plagiarism checker for free, and paid plans are $11/month or $18/month, with customizable plans for enterprise users.

3. PlagScan

It is another well-known name in the world of plagiarism detection software. PlagScan reliably identifies duplicate content on the internet and is very easy to use.

PlagScan - Plagiarism Detection Software

The tool is particularly popular among schools, colleges, universities, and other educational institutions.

PlagScan’s features include the source list, which lets you know where duplicate content can be found. Not only does the source list show matches from third-party websites but also from documents that you’ve previously submitted for review and your organization’s repository.

Its Plagiarism Prevention Pool (PPP) is a collaborative effort between other PlagScan clients that allows cross-checking of your submissions against their other clients’ submissions. The pool is continually growing as more content is submitted for review.

PlagScan’s results are also made easy to read, with text highlighted according to different types of matches, and your document is shown side by side with the matching text for easy reference.

PlagScan private plans start at $5.99/month for 6,000 words and go up to $49.99/month for 100,000 words. Business plans start at $17.99/month and go up to $22.99/month.

4. Grammarly

Grammarly is another well-known platform and is popular among writers, students, academics, professionals, and casual internet users.  

Its plagiarism checker compares documents against vast databases and billions of web pages. The results are easy to read, with links to the source of the match clearly provided. Grammarly’s plagiarism checker software is among the most reliable there is. But checking for plagiarism is not what the tool is best known for.

Grammarly - Plagiarism Checker

Most people use Grammarly for its advanced grammar and spelling checking features. The software can check for grammatical errors while also offering advice on how to make content easier to read. Grammarly can also advise on corrections regarding clarity, correctness, delivery, and engagement. If you need help writing a killer follow-up email, Grammarly can help you get the tone just right. 

Grammarly is also compatible with a selection of apps, including Microsoft Office, Windows, and Google Chrome, the latter of which helps ensure correct spelling when using online portals such as forums and social media.

The platform is also available for the iPad, while the Grammarly keyboard helps make typing on a smartphone easier and more accurate.

Grammarly’s free plan offers spelling, grammar, and punctuation suggestions. You will need to purchase a paid plan to check for plagiarism. Paid plans include the premium plan at $12/month and the business plan at $12.50/month per user. 

Paid plans also offer more features than the free plan in addition to plagiarism checking.

5. PaperRater

PaperRater is another one of the best plagiarism checker tools widely used by academic institutions. The platform uses advanced AI technology to analyze text for plagiarism and produces good results, even if it’s not as reliable as other options mentioned so far. 

PaperRater - Free Plagiarism Checking Service

The platform offers a free plagiarism checking service where you simply copy and paste the text into the box provided. The premium plagiarism checker is more accurate and displays text that matches your document.

PaperRater also offers tools that check grammar and spelling, again using advanced AI and machine learning software. In addition to looking for errors, the tool also checks the text for other criteria such as detecting passive voice, phrases that you should avoid, the length and variability of sentences, and readability.

The tool offers a vocabulary builder that expands upon the user’s vocabulary with suggestions and examples of how to use words in sentences.

PaperRater offers a premium plan in addition to a free plan. The premium plan starts at $11.21/month and offers fewer search restrictions and access to more advanced features.

6. Search Engine Report Plagiarism Checker

Search Engine Report’s plagiarism checker is free and easy to use. Just paste the text into the box provided, and the results will be with you in moments. The checker highlights original text in green, with duplicate text highlighted in red, making it easy to identify problem passages.

Search Engine Report - Plagiarism Checker

You can add up to 1,500 words of text per search, and you can also check by uploading the file or entering the URL.

The platform also offers writing tools that check grammar, spelling, title capitalization, word count, and paraphrasing. It also has an article rewriter. Search Engine Report’s non-writing tools can help with other tasks related to SEO.

Unlike other plagiarism checker tools, the tool from Search Engine Report is appealing due to its ease of use and the clarity of its results. The SEO tools can help you ensure your website ranks highly.

7. Small SEO Tools

Avoiding copied content is a key element of good SEO, so it makes sense that a plagiarism checker software would be a part of a platform providing SEO tools.

Small SEO Tools is another easy-to-use platform. Scan text by pasting it in the box provided, uploading the file (including from Dropbox), and entering the URL. The free version allows you to check up to 1,000 words per search. 

Small SEO Tools -  Plagiarism Checker Software

Small SEO Tools checks text against Google, and the results are limited to exact matches only. This means it is unlikely to detect cases of plagiarism that have been hidden by spinning the text.

However, this is still likely to be enough for SEOs whose main concern is ensuring that their website ranks well.

Small SEO Tools also comes with a selection of other features for those who need blog content to rank well. These include a spelling and grammar checker, keyword suggestion tools, a keyword rank checker, a backlink checker, and a selection of tools that help you convert documents between different file types.

Whether you’re looking to create high-quality content for your sales funnel or ranking high up in the SERPS, Small SEO Tools is a useful tool to have. 

8. Copyleaks

Copyleaks is one of the best plagiarism checker tools that scores well for accuracy, with searches performed using vast databases as well as internet sources. The platform uses AI to help keep up with the latest practices used to deceive plagiarism checkers.

Copyleaks - Free Plagiarism Checker

Copyleaks also offers the Copyshield service that monitors the web for instances of another website plagiarizing your content.

People in many professions can use the tool, but Copyleaks is particularly popular among academic establishments and students.

The Copyleaks interface is intuitive and easy to use, although you will need to register to use it. The results highlight any text that is plagiarized, whether the text is identical, if it has undergone minor changes, or if the meanings are similar.

The platform also offers an AI grading tool that helps educators grade open-ended written assignments.

Copyleaks offers a free plan, but it has a limit of 20 pages. Pricing for premium plans starts at $10.99/month and you can arrange for a demo of how the platform can help prevent plagiarism and protect your content.

9. PrePostSEO

PrePostSEO works by scanning online data using advanced algorithms to help find content that’s been paraphrased or copied directly. The tool gives you a list of sources that the text has been copied.

PrePostSEO - Free Plagiarism Checker Tools

The free version is easy to use. Simply paste your text into the tool or upload your file. The platform also has a “remove plagiarism” tool that will help you paraphrase matching text to pass plagiarism checks.

The platform also comes with a wide range of other free writing tools such as grammar checkers, an article rewriting tool, and page comparison tools. If you use an AI copywriting tool and you want to make sure the copy sounds like it was written by a human, PrePostSEO may be able to help.

It offers other tools that help with SEO and web management, plus it has a range of powerful calculation tools.

The free plagiarism checker scans up to 1,000 words for non-sign-ups and 1,500 words if you are. Premium plans start from $10/month and offer more features in addition to higher search query limits.

10. Quetext

Quetext uses its proprietary DeepSearch technology to provide accurate and in-depth results. Not only does the platform detect exact matches but also instances where words have been changed to try and hide plagiarism.

Quetext - Plagiarism Checker Website

The software also analyzes the context of the text to help further identify attempts to disguise plagiarism. Therefore it naturally qualifies to be one of the top plagiarism checker tools.

Quetext presents its results in an easy-to-read format, with the text highlighted in different colors to represent different categories. Simply paste your text into the box provided and click the “Check for Plagiarism” button.

Quetext has a free plan that lets you check up to 2,500 words (five pages). The paid “pro” plan starts at $9.99/month per user. It allows up to 100,000 words (200) pages, and it gives you access to more features.

Which Plagiarism Checker Is The Best?

Which plagiarism checker works best for you depends on your needs and your budget.

Some are best for educational institutions that want to ensure their students are submitting work that they genuinely wrote. Other tools might be better for website owners and SEO agencies who want to ensure that their online content isn’t flagged by the search engines. The ability to be notified when their content has been copied by somebody else can benefit a wide range of users.

Whatever you need a plagiarism checker for, there are plenty of options available. Free plans and free trials offered by some platforms mean you can try them out to see which one works best for you before buying.

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